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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '66013d18f469e6ab0c124cabc80c30cb7a13e84af1ab938e77b4334bb7a0fdc8' 
  AND token = '4nK+efRIG8k6ZFxHCKfFJoGGkSM8BcJQbhjkpZhQkL0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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