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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4788188e07dc779fb90e306b38b86c8c3406f9d39910b2d27cd87995cd9e832a' 
  AND token = 'ni80pxwLccCXqbrYPGgZ1N/Mec5QHeu8UE+iy5A+AmE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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