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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aeedafa3b2fc3ba51dee7430ce5f0ad28989e411e2e4ffe9f8fa42d2a38d9e0e' 
  AND token = 'CG/uo9LgweuOxBwE+kg9rd5hEZ1PYmU7SklxInu1X9U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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