Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e84f1c213bfc91f39d3ecbe315386407cc791d6260d701b594e288121461df8' 
  AND token = '5hp81S6oBvbw0RT/vpp/rGuE+VzLDAeOcNDEXcR0Qls=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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