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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3b9dc0ae5a1661dbf0554a3f320297b96bbeb0d5e8b04b00a97cfd7a2b2ae1a5' 
  AND token = 'Sz+TZGwn2TvuQd5c3P+Sw7xoDwiiHT2YytzubZv8YZo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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