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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd65aefb1c3158fe750e0283c7f750ba75897fc9e07053dc7b0c4c90501b50fac' 
  AND token = '0/d+V3kfKAXTqpeCHeVyhK7B/nCyGoXZ56T6IUzoOos=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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