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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce860300eb6e740340294b4ba2929d512b9b04803d79fdc123f47c459c0caee6' 
  AND token = 'm8pZ5oqiETbTja/I+HjmUHR7nr5yWORXufA2immL/Ns=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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