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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec9f8aae6464ebbe7d495b3d2be51093289a3dd3f2a20005293130befc8768ef' 
  AND token = 'Uy9axRKiOoNNRt+cec65fIEVKewbHCh/VrIS1SaufFk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00124

JSON explain

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