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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b302780d6e2f83d3d47c034a3bb6315048a3386578b20d58cf5362831cd115aa' 
  AND token = '97eiZszjJs3BYQA195Uif06/VraMlar3DUjigPXVReg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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