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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d515e0363eddfcf08e3cf856a1dcb376f10a676c97eb6f1415cb19fbeace136' 
  AND token = 'Ba0KV24oCrHUq/lA9vJ4fUYl2fLnZ8t/Cl7Sklmomeo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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