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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'baaa5671326418146c36d8ef23cc58772e01a128f34f8e697c01045e8af735b3' 
  AND token = 'BxYOep3ip1qaC4VM43BJrYpt/8Fg1XrgMbp6PuEAaVc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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