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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25fae8ffaca2e18e7315f59813790fb872765630e22d26f2500bff348ca91ee5' 
  AND token = '4AKw6KpvO1jZ0algCECApsZSN6mP2tlMDOOQMzs0SCA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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