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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e37b93c27709a5fb3fdf319865e28ee202200fa21a699ebca1de1b601b158091' 
  AND token = 'Yktam15wrY4HjP2/SRuOcp9C3FHDuJxl5Sxw+qYjfVs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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