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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef629cd76e2dfb5b55848546526b3e1a71ad7ba330cf1207eadda02e00fefaf3' 
  AND token = 'ZraLFtp3zQUsi7JHSKJP2W3TrtZqg+c8tuCr1eLfvqQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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