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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9ba068c8f2130058377b7ea91b158eb2d0c87adaabd1ce2a1791a78f265ecf70' 
  AND token = 'x32l/mr/2sCVshBwVIBxYjOYS1nR0/sqblyzztMABac=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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