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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '437a0e32874161bd7a73d646404715d925edfd0807a480418d4b865e7bc574e6' 
  AND token = 'IxntlfVpHWIcilgZiUeiWg4nC2c0RO7bLWKfo/knPNI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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