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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'eed33ba3b1a4effa4ee336d1d0c4acd04d892d8e5d1722c73a5508d9133129a5' 
  AND token = 'LwDBNys8yklPBIP3QonIW/166bFfX/cGwSkRL4wIGUg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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