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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5badfcdbece25ba7015c18685c30241cb804e5cdc66ca2f849c8434a1c9e1ab1' 
  AND token = 'P3N08/sLPh+z+U1QuYJ/05n2Sw/h9ngzKEP4dKQVW/8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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