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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1a7ce262646599e0d1ddf3622f7cde89f7b5d2a5f6fd624024a657e3d5da041' 
  AND token = 'RgJnp1AGwC1UWY1haU4gq9AhjuQX2B/epg4iKUz51WA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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