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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '690f3e44de1f358c017df2d7145f40adae0625629cda3070ce489d5e581f1663' 
  AND token = 'EXA9bRgzCaxWI1PRbl5CTj0/mZIwPkQpzNCeBf0Dg0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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