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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '510a99491e9b1a7866b4f7eb96900ed34cc581c122620a2c6ba642cba681371f' 
  AND token = 'yHWtaNENm7iigDsEZucNYIm0OWD7pJQ1R2nFFU0+B2g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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