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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87142ccdf075ba1ce0cfe391c0c06e61db5f874cea3ee669c6cadbaf7752692a' 
  AND token = 'OpcK5Mk5W4xritkXfvNRaX8Hl/CCpfy3C0mQRuPqWqI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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