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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3fa889cfd8d29a170ae7af8917bb5b01dd74d7f52a6eed4177f33b6d8ff707e7' 
  AND token = 'ciEZALH72/+YAaW03p64qqcNQ3Ju6btLlv8BnjsGSUA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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