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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2b23e09a9343eeb1a35d582895539dcdc98d1a21c0f74ef77f4e99412a0418ab' 
  AND token = 'yvZjOurD98Qo9rkyqiF84KiwQErygxUG64L3h2Wp+9U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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