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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a17604f0d6d5871271b28932a57e6e67b2f47bf72baa72e29918a8bf80c90c90' 
  AND token = 'odnp4FM2F9yZWrMnl1fmtOR3HDyT1PYe3aCiGGhejpc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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