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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbd38b5c6225ecea0e92e76a179d3405af4cb0564cd04fc7877ab5ae5c1cb471' 
  AND token = 'EGZHj0Ww0TBuYHARTjBjEtB1x7/EXQNmzJWKP2nNLJ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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