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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a951ab62a7cbc5b06a45d99c4ad8aa867a25dca92331092dcfe11ecaddcca24b' 
  AND token = 'EKOogayuhx3UljZcHK7tW9GggMQ6kqhyaskJLCCK7Dw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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