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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9f514e7e845a454799b8e739ad9677a931e48927fa6cd7c2c81c3b37d43fba35' 
  AND token = 'd2rBFZLIGpnCU0t6scax1RCgvR+6TvcQ2y0U4UedOms=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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