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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '870560cf2770ad61324a32d1ccb65aaba4188de8244525837782ecff86ba07bf' 
  AND token = 'XAm82PEi27Ili1kevhJA8nlPtNxcTQ6xTAbGm5h44I0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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