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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bc4131826ca1d9e5be877dfe08673b80d8b784160bd12d847aad98242614dcbc' 
  AND token = 'fqX8JaB7YofCix8A+lCc9HTbCRDQlRZ5RsCs0Hrr7vY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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