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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ee422e8289b9168de7ee54213218486d0488e50ab7a7c7a6dd4c24f56005c5a' 
  AND token = 'qliz1WmeU5vNskOohfLtpzth54ORKyJbnxxrQXC32p4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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