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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '995e778414e3469511e7945bff235a39dbf2c13b2cd40ad69b562f8179d503c9' 
  AND token = 'TLhq97vZxBicHMAIclEuPMoDocuB4Ce4OPzdHCt+qfE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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