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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e1949b0a25a12c49dfbc82301f3f5f20680c59b61c167bcea2633d1d7ad6c4e' 
  AND token = 'uDv8KRWSBjcI95ByYk3w+K+hw8N93w4SlfBr0/qKrnI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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