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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '206568cc42dd67e9e868bcd5d334662747ea5cdf886407a54bc699fa3b26e0e3' 
  AND token = 'wAwaIz2B5dWP+PxkA/A0qwWdNFh9sFEp9mgxwMctTJY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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