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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bad0d57a076c2995d123e895d4f6088249e421fcc9968c5ef7c67305d1a8dbb3' 
  AND token = 'cR7m/iYx2RmjyuD+4tNet8waFyJAZcM0h8IHp1b1OXo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}