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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2fa1c266426140819886847675becc8f16258cef387314640230a5dc97b12481' 
  AND token = 'Bh5cAWtHWknaHoh+6DU2FGa1Rp61GpkZNK2ie24y+zk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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