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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23d363c0a3221b6c2352a5e54bf1e65777d9ca87a528a856eb48fd5dca316dfb' 
  AND token = 'wEMECg8TAJS00HPVShe6EBMn5NMj9NprUX6hhM08830=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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