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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0cd7b2b9a8e0abfa9ac4a56bf86781956fe98d48ce2e19cc7b0db3365e9000f1' 
  AND token = 'zzDFDv/suGWiRsdk0Bz6qN8P3cXUQSjP85EaO6OnydY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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