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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '095b3e9b9ccf00e91fa66fdd3f6fcbe3c9d156372d49b92a3a46addaf3fae221' 
  AND token = '7riUT7/4W95ph5oFonLj5xFoqFu5J9VRxbGhvan87kQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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