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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f127bb674b9345c823c461ac6b440a7c9093f119f788bcbd9985df14f3a504e6' 
  AND token = 'pzz5NFkziS0x9OSb6ApMvnNn3NO9aCH1Lodjtt95DPQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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