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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5be179573cd57bf43e4e5b13c79ece07a6aaff59b3b0e9ad8a02fd39aad6deaf' 
  AND token = 'ZFz0O8mdF4qDLuYdYho/Ak520SbQsMfMjW/VHorx6Xc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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