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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '053f2d6539f30491b1c9b3f9a1a236fe6e84bd6d1e0cf1a233ff119f9cdda9fc' 
  AND token = '+2/luit1oCOdjco7CBit/aecFf6GlC3sqJrPfhVJGe8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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