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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eecab3358fa0fc971ae613bf5e712e3a5935e74292c7132b62002487cd1c8ce0' 
  AND token = 'l01nq3+fE2gC1MOQV85SlKTOnO1ouGj/DlNbGDnRu/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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