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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95089caaf700e31454910eda1f315826389f3bdc880a7345f08aee882b33211a' 
  AND token = 'xKHT1J2MmIpwTMs1Dfhny7V8xLXje4VZi6B7OpZt4IY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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