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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '005e1af0db01e3bb3ecc3668aabb675292080b3fdd53295784fefa1a671233bd' 
  AND token = 'MxfDyl2pGAnn5FvR0tyNWt1AcOmuXoN6GKLPKKWVKjA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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