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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e0cb1f42650dc6a5f698042a5c00f46072d66991ba734d84bc9bab071d0d4321' 
  AND token = '/kDhg7aFgzVx9kObTCb1yanxYhW3Wlol5JKsxz6y5J0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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