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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '58dc2c8f9b66eb920e51e1285168507a3c0d31d006d0c47f5b24460aa5800ec1' 
  AND token = 'gIJpCK6vqtNjS/0rm0pOEdy8md7/bnqWaSusyJ4yipQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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