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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c085d9c5f3b2533797a98550e13db81d0d1a78c32d388a4ab3c1245fdfec8164' 
  AND token = 'wM8hu6dG5GHKbk737Fvq485ca9nQ5tm5w1x+Un/IIng=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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