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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bd6707d5634c330700561dd09d687f3b102bfc5e49f92caa4577d88916569a63' 
  AND token = 'KUn3w3JA8AAX90SLxy/6UEgHF6Zo2jolwEiH5/SN/VE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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