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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37987f29e88b05ca8edd26ff9c89bee7478074bdebb0b1e70056320cabc2ec95' 
  AND token = 'p31j9zJok78D9/XFDZN9I3BRcs7c7meyBsswYQ7HsNA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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