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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fa6b1176fb40d5b4b142726b65bf57f4008afa87b00bf293a9cd4d0c3200e6e4' 
  AND token = 'T7CNmnyS78okV0160lypOVljFoUffoKk13a5DGIm4nQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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