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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a87b7ac4d615d6f6ed2d8f2e82cad6865a1ececdc8e1fe97dd1d01b6ec9989e7' 
  AND token = 'Lc52Nc3kBWGfj4/Eb9riR/peBPTA37e/wbXiIGoOLhY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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