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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fa6e037fe3dcbfae0d8f5f7cb40d8923d1c27c1da21ffda440a1d377a809ec65' 
  AND token = '7Nzypv11USH8GEQxeAivUKW17ltIvm3yrJ0fJ5lOtpU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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