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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7ab203eb66fc027139fe6eefce8f1488963f2cddb0b5a62aefa11d99b91758e0' 
  AND token = 'bDFPF3kF8Qtu60hXwkEE7owRftsn4GTVtTruLTGYeSM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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