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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '932b98110b4efb6d0f93857286505b70136abce4c2c63769364cbc1338ee39fc' 
  AND token = 'CW+9jOwl97ubuExr9eVQm5USpPDYbpH3lupbXUOKe0c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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