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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36c5a53e10c1c0df02a86cce97777aeace9248ea657a6043d4ae49ecb7fd7ea9' 
  AND token = 'rRwWN0tlq62CH/kq93CwfUaZYAOg3uL6sEMNs5+6WxE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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