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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd06537e2e9b0042149f8318e0095a05345289b90ee9ab0b7f2672d1c15f4aec0' 
  AND token = 'wgx/CJd5hXnnPuOOt56R2F0/NCL2z6WdbRqBf+mBpa8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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