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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4fe3874d1dfc1ed225c90971dc2654618450c8f2faab587bca9a888c783aef1e' 
  AND token = 'fZ+gV300Ch+z//5Z8/9vp8J+yE/6epfUs+on121m9po=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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