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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e29fbef2ddcd2829b41e9b545e1191ccfe7065f098ac8d5ad022b598f0987afc' 
  AND token = 'ERHffAidORG97/6mQ8vfun5aV7RjC2SCJ0AiXOUmc/I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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