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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7ae25ec36a4c6c6145a75ec5918ff200ba0ba22edd140433c775d72d8abdcd9' 
  AND token = 'wCk98+BK8Pu48AaxjPMIhRZy87hz2nSydtxJRvn/wZ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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